While you wait for answers, we may have found some information which could help you.
Success
Message
my briggs and stratton 3.5hp starts up then cuts out straight away?
lawn mower briggs and stratton classic 35?
My Briggs & Stratton 10.5 engine will start but dies after about 15 mins?
Adding oil to mower ?
Briggs and Stratton SP470?
westwood t1200?
lawn mower won't start?
McCulloch lawnmower parts removal ?
How can I fix Mountfield Laser Omega 46 Lawnmower?
lawn mower engine hunting?
litres of oil needed in a countax c600h ride on lawnmower?
Petrol or diesel?